Acoustic generation in crystalline silicon with femtosecond optical pulses
Acoustic generation in crystalline silicon with femtosecond optical pulses
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DOI：
10.1063/1.113853
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发表时间：
1995-03
影响因子：
4
通讯作者：
O. Wright;V. Gusev
中科院分区：
文献类型：
--
作者：
O. Wright;V. Gusev
在飞秒可见光脉冲激发下，观察到体硅晶体的体积收缩。使用基于探测光束反射率变化和探测光束偏转的检测来测量表面变形和产生的声应变。收缩是由电子-空穴对的激发对应变的主要电子贡献来解释的，这淹没了热弹性膨胀。
Volume contraction in bulk silicon crystals is observed on excitation with femtosecond visible optical pulses. The surface deformation and generated acoustic strain are measured using detection based on both probe beam reflectivity changes and probe beam deflection. The contraction is explained by the dominant electronic contribution to the strain from excitation of electron‐hole pairs, which swamps the thermoelastic expansion.